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Proceedings Paper

PUMA: the first results of a nebular spectrograph for the study of the kinematics of interstellar medium
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Paper Abstract

The kinematics of the interstellar medium may be studied by means of a scanning Fabry-Perot interferometer (SFPI). This allows the coverage of a wider field of view with higher spatial and spectral resolution than when a high-dispersion classical spectrograph is used. The system called PUMA consists of a focal reducer and a SFPI installed in the 2.1 m telescope of the San Pedro Martir National Astronomical Observatory (SPM), Mexico, in its f/7.5 configuration. It covers a field of view of 10 arcmin providing direct images as well as interferograms which are focused on a 1024 X 1024 Tektronix CCD, covering a wide spectral range. It is considered the integration of other optical elements for further developments. The optomechanical system and the developed software allow exact, remote positioning of all movable parts and control the FPI scanning and data acquisition. The parallelism of the interferometer plates is automatically achieved by a custom method. The PUMA provides spectral resolutions of 0.414 Angstrom and a free spectral range of 19.8 Angstrom. Results of high quality that compete with those obtained by similar systems in bigger telescopes, are presented.

Paper Details

Date Published: 9 July 1998
PDF: 7 pages
Proc. SPIE 3355, Optical Astronomical Instrumentation, (9 July 1998); doi: 10.1117/12.316745
Show Author Affiliations
Rosalia Langarica, Univ. Nacional Autonoma de Mexico (Mexico)
Abel Bernal, Univ. Nacional Autonoma de Mexico (Mexico)
Margarita Rosado, Univ. Nacional Autonoma de Mexico (Mexico)
Francisco J. Cobos Duenas, Univ. Nacional Autonoma de Mexico (Mexico)
Fernando Garfias, Univ. Nacional Autonoma de Mexico (Mexico)
Leonel Gutierrez, Univ. Nacional Autonoma de Mexico (Mexico)
Etienne LeCoarer, Observatoire de Grenoble (France)
Carlos Tejada, Univ. Nacional Autonoma de Mexico (Mexico)
Silvio J. Tinoco, Univ. Nacional Autonoma de Mexico (Mexico)

Published in SPIE Proceedings Vol. 3355:
Optical Astronomical Instrumentation
Sandro D'Odorico, Editor(s)

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